Epson EMP-S3 Service Manual download pdf (Page 42)

2-16

EMP-S3

SEIKO EPSON Revision:B

2.8 Temperature Control

2.8.1 Sensors and Switches

This projector is equipped with the devices shown in the table below in order to protect the

safety of the operator and maintain general safety with regard to the projector itself by prevent-

ing abnormalities in operation.

Lamp Lid Detection Switch

This switch is located on the Inner Exhaust Duct and connected to the lamp lid latch on the

inside base of the projector, and prevents current from going to the lamp if the lamp lid is open.

This lid is opened only when the operator is replacing the Lamp Assy. The switch is provided

in order to prevent the danger of burns that could occur if the lamp turned on accidentally.

The lamp lid detection switch is connected to CN900 on the MA board. When the lamp lid

opens, IC501 (IFCPU) detects the lamp lid open signal and sends the Lamp OFF signal to turn

off the lamp.

Figure 2-19. Lamp Lid Detection Switch

Table 2-3.

Sensor/Switch Location Function

Lamp lid detection switch On the Exhaust Duct Inner

Interrupts AC power when the

lamp lid is opened. Power cannot

be turned on until the lid is closed.

TH board On the Exhaust Duct Inner

Prevents overheating around the

Lamp Assy. Turns the lamp off

when a temperature rises above a

certain level.

Safety Switch

On the side of the Exhaust

Duct Inner

Prevents overheating around the

Lamp Assy. Interrupts the AC

power when a temperature rises

above a certain level.

Lamp Lid Detection Switch

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 95 96

No comments

Epson EMP-S3 Service Manual Page 42